Calculator ruler



FIG. 1 is a front side perspective view of my new design with the phantom lines depicting environmental structure and forming no part of the claimed design;

FIG. 2 is a front elevational view thereof with the phantom lines depicting environmental structure and forming no part of the claimed design;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a back elevational view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a cross-sectional view thereof taken along lines 8—8 of FIG. 1. 

The ornamental design for a calculator ruler, as shown and described. 